imsmp mismp ismmp simmp msimp smimp immsp mimsp immsp mimsp mmisp mmisp ismmp simmp imsmp mismp smimp msimp msmip smmip mmsip mmsip smmip msmip imspm mispm ismpm simpm msipm smipm impsm mipsm ipmsm pimsm mpism pmism ispmm sipmm ipsmm pismm spimm psimm mspim smpim mpsim pmsim spmim psmim immps mimps immps mimps mmips mmips impms mipms ipmms pimms mpims pmims impms mipms ipmms pimms mpims pmims mmpis mmpis mpmis pmmis mpmis pmmis ismpm simpm imspm mispm smipm msipm ispmm sipmm ipsmm pismm spimm psimm impsm mipsm ipmsm pimsm mpism pmism smpim mspim spmim psmim mpsim pmsim msmpi smmpi mmspi mmspi smmpi msmpi mspmi smpmi mpsmi pmsmi spmmi psmmi mmpsi mmpsi mpmsi pmmsi mpmsi pmmsi smpmi mspmi spmmi psmmi mpsmi pmsmi
Note: these 'words' (valid or invalid) are all the permutations of the word imsmp. These words are obtained by scrambling the letters in imsmp.